Quick answer
Hematite is an iron oxide mineral best known for its bright metallic, silvery-grey to black shine and its surprising weight. A reliable way to identify it is its red-brown streak, which is also where the name comes from. It rates 5 to 6.5 on the Mohs hardness scale. One important point for shoppers: natural hematite is only weakly magnetic, so the strongly magnetic "hematite" sold for bracelets is almost always a man-made material, not the natural stone.
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Pick up a polished hematite stone and the first thing you notice is the weight. For its size it feels remarkably heavy, with a cool, mirror-bright metallic surface that looks almost like polished steel. Hematite is one of the most distinctive stones we stock, and also one of the most misunderstood, largely because of the magnetic version sold under the same name. This guide explains what hematite actually is, the simple test that identifies it, the truth about magnetic hematite, and how to care for it.
What is hematite?
Hematite is an iron oxide, with the chemical formula Fe2O3, and it is the most important ore of iron on Earth. In its polished form it shows a striking metallic lustre that ranges from bright silver-grey to a deep gunmetal black. Some natural specimens form rounded, bubbly masses known as kidney ore, while others appear as sparkling, mirror-like plates called specularite.
Because it is essentially iron, hematite is dense, and that heaviness is one of the easiest ways to recognise it. A hematite bead sits noticeably heavier in the palm than a same-sized bead of quartz or glass. It is a hard but somewhat brittle stone, sitting around 5 to 6.5 on the Mohs scale, so it resists scratching reasonably well but can chip if dropped.
Major sources include Brazil, Australia and the United States, and the United Kingdom has its own long mining history, particularly the rich kidney ore once worked in Cumbria. Wherever it comes from, the same simple test below confirms whether a grey metallic stone is genuinely hematite.
The red streak and where the name comes from
The single most reliable test for hematite is its streak, the colour of the powder it leaves when scraped across a rough, unglazed white tile. Despite its silvery-grey surface, hematite always leaves a distinctive red-brown to rusty red mark. No amount of metallic shine changes this, which makes the streak test a quick way to separate hematite from look-alike grey minerals.
That red powder is also the origin of the name. Hematite comes from the Greek word haima, meaning blood, a reference to the deep red colour the stone produces when ground down or found in its earthy form. The same iron oxide is responsible for the red tint of much soil and rock, and it has been used as a red pigment for thousands of years.
If you are doing the test at home, use the back of a plain ceramic tile and only a light stroke, since hematite is harder than some tiles and you want a clean line rather than a deep scratch.
Is "magnetic hematite" real hematite?
This is the point most shoppers are surprised by, so it is worth being clear and factual. Natural hematite is only very weakly magnetic. A genuine hematite bead will not snap onto a fridge magnet, and a strand of natural hematite beads will not cling together or stand up in chains.
The strongly magnetic "hematite" widely sold for bracelets and novelty magnetic jewellery is a man-made material, usually a sintered (compressed and heated) iron-based ferrite that has then been magnetised. In the trade it is often called hematine or simply magnetic hematite. It can look very similar to the natural stone, but it is a manufactured product rather than mined ore.
There is nothing wrong with buying it if you like the look or the magnetic novelty, but it should be described honestly. As a rule of thumb: if the beads strongly attract each other or a magnet, you are holding the man-made version, not natural hematite. We label our natural stones and any man-made materials separately so you always know which is which.
How hard is hematite, and is it water-safe?
At 5 to 6.5 on the Mohs scale, hematite is fairly hard, but because it is iron oxide it does not love water. Brief contact is fine, yet prolonged exposure can dull the polish or, over time, encourage rusty surface marks. A few simple habits keep it looking sharp:
- Keep water contact brief. Wipe with a soft, dry or barely damp cloth rather than soaking, and never leave it sitting in water.
- Avoid salt water and chemicals. Sea water, cleaning products and strong jewellery dips can corrode or dull the surface.
- Remove it before washing or swimming. Take off hematite rings and bracelets before hand-washing, showering or the pool.
- Store it dry and separate. A dry, lined box prevents both scratches and moisture marks, and protects the mirror finish.
For a wider view of which stones cope with water, see our water-safe crystals guide. To freshen up a finished piece safely, our guide on cleaning crystal jewellery safely takes you through it.
Choosing hematite jewellery
Hematite's metallic shine makes it a smart, modern-looking choice for beads, rings and pendants. A few checks help you buy well:
- Feel the weight. Genuine hematite is heavy for its size, a quick and useful first impression.
- Check the magnet question. If a piece is strongly magnetic, it is the man-made version, so make sure it is described that way.
- Look at the polish. A clean, even, mirror-bright surface with no dull or pitted patches points to good quality.
- Mind the edges. Hematite can chip, so look for smooth, undamaged edges and tidy drill holes on beads.
If you are buying a bracelet, our crystal bracelet size guide helps you get the fit right first time.
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Crystal Bracelets Crystal Necklaces Men's Jewellery Tumbled StonesFrequently asked questions
Is hematite naturally magnetic?
Only very weakly. Natural hematite will not snap onto a magnet or cling in chains. The strongly magnetic version sold for bracelets is a man-made material (often called hematine), not the natural stone.
Why does hematite leave a red mark?
Because it is iron oxide. When scraped on an unglazed tile it leaves a red-brown streak, and that red colour is where the name comes from, from the Greek word for blood.
Can hematite go in water?
Keep water contact brief. As an iron mineral it can dull or develop rusty marks if soaked, so wipe it with a soft cloth and avoid salt water, chemicals and long soaking.
Why is hematite so heavy?
It is essentially iron oxide, which is dense, so a hematite piece feels much heavier than a same-sized piece of quartz or glass. That weight is a handy first clue that a stone is genuine hematite.
